Check Point Advisories

FreeBSD nfsd NFS Mount Request Data Length Denial of Service (CVE-2006-0900)

Vulnerability
Protection

Check Point Reference:	CPAI-2013-002
Date Published:	8 Jan 2013
Severity:	High
Last Updated:	Tuesday 08 January, 2013
Source:
Industry Reference:	CVE-2006-0900
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A denial of service vulnerability was detected in the NFS server. An error was detected in the part of the NFS server code that handles incoming RPC messages via TCP. When the server receives a message with a zero-length payload, it would cause a NULL pointer dereference, allowing a remote attacker capable of sending RPC messages to an affected FreeBSD system to crash the FreeBSD system.

Protection Overview

IPS will detect and block crafted requests sent to the target NFS daemon.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the FreeBSD nfsd NFS Mount Request Data Length Denial of Service protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: NFS Protection Violation.
Attack Information: FreeBSD nfsd NFS Mount Request Data Length Denial of Service